Glass manufacturing – With means providing parting material
Patent
1997-08-19
1999-03-30
Chin, Peter
Glass manufacturing
With means providing parting material
65 24, 65 251, 65 26, 65170, 65307, 425 95, 425 96, 425412, 264 81, 427133, 427249, 4272553, 427399, 427446, 427450, C03B 4000
Patent
active
058882669
ABSTRACT:
Apparatus which is disclosed comprises a metal mold, a metal plunger and an annular manifold, and includes means for moving the plunger and the manifold between an open position in which the manifold surrounds the plunger and a gob of softened glass can be introduced into the mold and a closed position in which the manifold surrounds the plunger and the latter forms, with the mold and the manifold, a cavity in which a glass part can be formed. The manifold and the plunger have facing walls which are above the mold cavity, have portions which are in close fitting sliding engagement, and, thereabove, portions which diverge away from one another and form an annular space. The apparatus is operable, when the plunger and the manifold are in the open position, to cause a gas which is a mixture of at least one alkane and at least one unsaturated aliphatic hydrocarbon to flow from the manifold around the exterior of the plunger, through orifices which extend downwardly and inwardly through the manifold and to ignite the gas mixture so that it deposits a substantially invisible lubricious coating on the plunger. The orifices discharge the gas mixture into the annular space formed by the diverging walls of the manifold and plunger. There is an annular groove in the manifold which is open to the interior of the manifold, and an annular ring through which the downwardly and inwardly facing orifices extend. The ring is releasably engaged with the manifold and, except for the orifices, closes the groove in the manifold.
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Bowling Arnold
Eagle Peter T.
Chin Peter
Colaianni Michael P.
Purdue David C.
Purdue John C.
Thomas Industrial Gases, Inc.
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